Gabrielle Giffords and her husband Mark Kelly are writing a book on gun control. And while publisher Scribner describes it as a "book on America's gun debate," the title makes it clear that Giffords and Kelly are taking a side.

The book will be called "Enough: Our Fight to Keep America Safe from Gun Violence."

Giffords was an Arizona congresswoman who was shot in the head during a 2011 attack on a public meeting she was holding with constituents at a Tucson mall. Giffords was among 13 injured; six people were killed, including a 9-year-old girl.

Giffords and Kelly, a retired Navy captain and astronaut, previously cowrote the book "Gabby: A Story of Courage, Love and Resilience" about their relationship and her recovery. They have also been active gun-control advocates, founding the organization Americans for Responsible Solutions.

Giffords' attacker, Jared Loughner, has been sentenced to seven consecutive life sentences plus 140 years in prison. His behavior before the attack had been alarming and he had been forced to withdraw from community college. After the attack, he was diagnosed with schizophrenia.

In a release from Scribner, Kelly explained that another attack prompted this new book. " ‘Enough’ was one of the first words Gabby said to me after we learned about the Newtown, Conn., massacre," he said. "As 2nd Amendment supporters and gun owners ourselves, we hope our book rouses the long-overdue conversation our country needs to make responsible changes to our gun laws so that no more precious lives are lost.”